'\" te
.\" Copyright (c) 2000, Sun Microsystems, Inc. All Rights Reserved.
.\" The contents of this file are subject to the terms of the Common Development and Distribution License (the "License").  You may not use this file except in compliance with the License.
.\" You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE or http://www.opensolaris.org/os/licensing.  See the License for the specific language governing permissions and limitations under the License.
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.TH PTREE_UNREGISTER_HANDLER 3PICLTREE "Aug 1, 2000"
.SH NAME
ptree_unregister_handler \- unregister the event handler for the event
.SH SYNOPSIS
.LP
.nf
\fBcc\fR [\fIflag \&.\|.\|.\fR] \fIfile \fR\&.\|.\|. \fB-lpicltree\fR [\fIlibrary \&.\|.\|.\fR]
#include <picltree.h>

\fBvoid\fR \fBptree_register_handler\fR(\fBconst char *\fR\fIename\fR,
     \fBvoid (*\fR\fIevt_handler\fR)(\fBconst char *\fR\fIename\fR, const void *\fIearg\fR,
     \fBsize_t\fR \fIsize\fR, \fBvoid *\fR\fIcookie\fR), \fBvoid *\fR\fIcookie\fR);
.fi

.SH DESCRIPTION
.sp
.LP
The \fBptree_unregister_handler()\fR function unregisters the event handler for
the specified event. The argument \fIename\fR specifies the name of the PICL
event for which to unregister the handler. The argument \fIevt_handler\fR
specifies the event handler function. The argument \fIcookie\fR is the pointer
to the caller-specific data given at the time of registration of the handler.
.sp
.LP
If the handler being unregistered is currently executing, then this function
will block until its completion. Because of this, locks acquired by the
handlers should not be held across the call to \fBptree_unregister_handler()\fR
or a deadlock may result.
.sp
.LP
The \fBptree_unregister_handler()\fR function must not be invoked from the
handler that is being unregistered.
.SH RETURN VALUES
.sp
.LP
This function does not return a value.
.SH ATTRIBUTES
.sp
.LP
See \fBattributes\fR(7) for descriptions of the following attributes:
.sp

.sp
.TS
box;
c | c
l | l .
ATTRIBUTE TYPE	ATTRIBUTE VALUE
_
MT-Level	MT-Safe
.TE

.SH SEE ALSO
.sp
.LP
.BR ptree_register_handler (3PICLTREE),
.BR attributes (7)
